Mouthpiece



FIG. 1 is a perspective view of a first embodiment of a mouthpiece showing my new design;

FIG. 2 is a left side view (where the view of the left side is a mirror image of the view of the right side) of the design of FIG. 1;

FIG. 3 is a bottom plan view of the design of FIG. 1;

FIG. 4 is a top plan view of the design of FIG. 1;

FIG. 5 is a front elevational view of the design of FIG. 1; and,

FIG. 6 is a rear elevational view of the design of FIG. 1.

The broken lines in the drawings depict portions of the mouthpiece that form no part of the claim. 

CLAIM The ornamental design for a mouthpiece, as shown and described. 